Re: [PATCH v3 3/3] selftests: pidfd: add tests for PIDFD_SELF_*

[John Hubbard <jhubbard@nvidia.com>]

On 10/17/24 10:28 AM, Lorenzo Stoakes wrote:
> On Thu, Oct 17, 2024 at 10:17:54AM -0700, John Hubbard wrote:
>> On 10/17/24 5:06 AM, Lorenzo Stoakes wrote:
...
>>> 	#ifndef __TOOLS_LINUX_PIDFD_H
>>> 	#define __TOOLS_LINUX_PIDFD_H
>>>
>>> 	/*
>>> 	 * Some systems have issues with the linux/fcntl.h import in linux/pidfd.h, so
>>> 	 * work around this by setting the header guard.
>>> 	 */
>>> 	#define _LINUX_FCNTL_H
>>> 	#include "../../../include/uapi/linux/pidfd.h"
>>> 	#undef _LINUX_FCNTL_H
>>>
>>> 	#endif /* __TOOLS_LINUX_PIDFD_H */
>>>
>>>
>>> Then the test code needs only to update the pidfd.h file to #include
>>> <linux/pidfd.h> and add a simple $(TOOLS_INCLUDES) to the CFLAGS += line in
>>> the pidfd self tests Makefile and we should be all good.
>>
>> Yes.
>>
>>>
>>> That way we always import everything in this header correctly, we directly
>>> document this issue, we include the header as you would in userland and we
>>> should cover off all the issues?
>>
>> Very nice!
> 
> Thanks!
> 
> I saw from your other thread the idea was to take snapshots and to run scripts
> to compare etc. but I suppose putting this into the known-stub directory

Actually, I'm not running scripts, because the only time things need to
change is when new selftests require a new include, or when something
changes that selftests depend on.

> tools/include/linux rather than tools/include/uapi/linux would avoid a conflict
> here.

This is the first time I've actually looked at tools/include/linux. That
sounds about right, though.

> 
> Or would you say the wrapper should regardless be in the uapi/linux directory?
> 

No, not if there is already a better location, as you pointed out.


thanks,
-- 
John Hubbard